<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <!-- 引入 Bootstrap -->
    <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script>
    <script src="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
    <style>
        .a {
            margin-left: 300px;
        }
    </style>
</head>

<body>

    <div class="a">
        <button type="button" class="btn btn-default" title="Popover title" data-container="body" data-toggle="popover"
            data-placement="right" data-content="左侧的 Popover 中的一些内容">
            左侧的 Popover
        </button>


    </div>
    <script>
        $(function () {
            $("[data-toggle='popover']").popover();
        });
    </script>
</body>

</html>